OpenIntro is an organisation that was started to create a free and open source introductory statistics textbook. The book is available as a free PDF download, or it can be purchased in paperback from Amazon for less than $10. If you want to learn statistics or need a little refresher, check it out.
Open Source Online Statistics Book (OpenIntro)
Share This Story, Choose Your Platform!
About the Author: Ryan Swanstrom
World-class tech teacher Author of Data Science 101 blog Helper of all people learning tech and data science